1. Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
2. Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
3. Department of Medicine, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada